Table 1 Participant characteristics by allocated response rate intervention group in the three embedded studies
8-month follow-upa (pre-call) | 12-month follow-upa (photo) | 12-month follow-upb (email) | ||||
|---|---|---|---|---|---|---|
Control (n = 95) | Pre-called (n = 95) | Control (n = 125) | Photo (n = 126) | Control (n = 116) | Urgent email (n = 115) | |
Baseline age, mean (standard deviation) | 50.5 (13.1) | 49.7 (13.9) | 49.2 (12.6) | 50.0 (14.0) | 48.6 (11.4) | 50.0 (12.3) |
Female | 68 (72) | 66 (69) | 89 (71) | 86 (68) | 73 (63) | 77 (67) |
Baseline Patient Health Questionnaire (PHQ-9) score | 16.4 (5.0) | 17.0 (4.5) | 17.2 (4.9) | 16.7 (4.6) | 16.9 (4.8) | 16.7 (4.5) |
Main trial arm | ||||||
Intervention | 42 (44) | 51 (54) | 64 (51) | 59 (47) | 51 (44) | 61 (53) |
Questionnaire completion method | ||||||
Online | 36 (38) | 38 (40) | 57 (46) | 54 (43) | 46 (40) | 33 (29) |
Paper | 42 (44) | 44 (46) | 54 (43) | 50 (40) | 47 (41) | 59 (51) |
Patient Health Questionnaire (PHQ-9) only (paper or phone) | 15 (16) | 8 (8) | 7 (6) | 14 (11) | 16 (14) | 12 (10) |
Not returned or withdrawn | 2 (2) | 5 (5) | 7 (6) | 8 (6) | 7 (6) | 11 (10) |